Investigating polaron dynamics in PM6:Y6 films for use in organic photovoltaics using time-resolved infrared spectroscopy

John R. Swartzfager; Guoyan Zhang; Stephen Wong; Enrique D. Gomez; John B. Asbury

doi:10.1117/12.2594381

26 August 2021 Investigating polaron dynamics in PM6:Y6 films for use in organic photovoltaics using time-resolved infrared spectroscopy

John R. Swartzfager, Guoyan Zhang, Stephen Wong, Enrique D. Gomez, John B. Asbury

Author Affiliations +

Proceedings Volume 11799, Physical Chemistry of Semiconductor Materials and Interfaces XX; 1179912 (2021) https://doi.org/10.1117/12.2594381
Event: SPIE Nanoscience + Engineering, 2021, San Diego, California, United States

Abstract

In the last 10 years, there has been a boom in the organic photovoltaic (OPV) community, with new devices achieving power conversion efficiencies (PCEs) of ~18%. This significant increase in device performance is due to a switch from polymer:fullerenes, such as P3HT:PCBM, to polymer:non-fullerenes, like PM6:Y6. These films are often created with the use of solvent additives which, when correctly chosen, increase the device performance. However, because many of these polymer:non-fullerene systems have only recently been developed the exact effect that these solvent additives have on the morphology, performance and electronic properties is not well understood. Here we use a combination of photoluminescence and time-resolved spectroscopy along with grazing-incidence wide-angle x-ray scattering to fully understand what is occurring at both an electronic and morphological level in a series of PM6:Y6 films with varying amounts of acetone used as a solvent additive. From these data we find that acetone changes the degree of mixing and crystal grain size, which leads to changes in polaron yield and recombination, which is reflected in device performance.

Conference Presentation

Citation Download Citation

John R. Swartzfager, Guoyan Zhang, Stephen Wong, Enrique D. Gomez, and John B. Asbury "Investigating polaron dynamics in PM6:Y6 films for use in organic photovoltaics using time-resolved infrared spectroscopy", Proc. SPIE 11799, Physical Chemistry of Semiconductor Materials and Interfaces XX, 1179912 (26 August 2021); https://doi.org/10.1117/12.2594381

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available